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KMID : 0368820150540040564
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Journal of the Korean Neuropsychiatr Association
2015 Volume.54 No. 4 p.564 ~ p.569
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Comparison of Neurocognitive Functions between Positional Obstructive Sleep Apnea Patients and Non-Positional Obstructive Sleep Apnea Patients in the Korean Elderly Population
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김형찬:Kim Hyung-Chan
강석훈:Kang Suk-Hoon/최진희:Choi Jin-Hee/정혜경:Chung Hae-Gyung/김태용:Kim Tae-Yong/소형석:So Hyung-Seok
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Abstract
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Objectives: Obstructive sleep apnea (OSA) is classified as positional sleep apnea (POSA) and non-positional sleep apnea (NPOSA) according to apnea-hypopnea index (AHI) changed by sleep position. The aim of this study was to compare neurocognitive functions between two groups in the elderly Korean population.
Methods: Forty-four subjects in OSA patients with total AHI≥5 participated as criteria for POSA (n=25) with 1) supine position AHI/non-supine position AHI≥2 and 2) total AHI≥5 or not (NPOSA, n=19). All participants completed clinical interview by physician and neurocognitive function assessments. Mann-Whitney U and chi-square test were performed for comparison of neurocognitive functions and sleep characteristics with polysomnography between two groups.
Results: No significant difference in demographic and clinical characteristics was observed between the two groups. However the NPOSA group showed more decline than the POSA group on the Boston naming test (p=0.034), digit span test (p=0.001), go-no-go test (p=0.042), and fist-edge-palm test (p=0.007).
Conclusion: In this study NPOSA patients were found to have lower cognitive functions compared to POSA patients. A larger sample and long term follow-up study might be needed.
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KEYWORD
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Obstructive sleep apnea, Sleep position, Non-positional sleep apnea, Polysomnography, Neurocognitive function
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